upgrade kerberos dependency to use only ansi-regex ^6.0.1 due to Security Vulnerability

Summary

Security Vulnerabilities in kerberos 2.0.0

This vulnerability comes from ansi-regex@2.1.1, which is a transitive dependency.
the solution is to upgrade depndency 

Motivation

How does this affect the end user?

Affected versions of this package are vulnerable to Regular Expression Denial of Service (ReDoS) due to the sub-patterns{{ [\\]()#;?}} and (?:;[-a-zA-Z\\d\\/#&.:=?%@~_])*.

Is this issue urgent?

yes, possible ReDoS